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Banner with Colorado and CDPHE logos on left with text on right reading Colorado Air Quality with Department of Public Health and Environment on the next line.

Detailed Air Quality Summary for 07/05/26 (Yesterday)

Learn more about monitoring sites: site descriptions and
real-time monitoring map

All data are collected real-time and have not been corrected nor validated.

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver
[expand +]		 RFN Unhealthy for Sensitive Groups 140 Ozone 82 PPB 8-hour 7 PM
Ft. Collins - Greeley
[expand +]		 GREH Unhealthy for Sensitive Groups 134 Particulate < 2.5 micrometers 48 µg/m3 24-hour 2 AM
Colorado Springs
[expand +]		 MAN Moderate 84 Ozone 65 PPB 8-hour 5 PM
Grand Junction
[expand +]		 PAL Moderate 67 Ozone 60 PPB 8-hour 8 PM
Colorado River Valley
[expand +]		 RIFLO3 Moderate 61 Ozone 58 PPB 8-hour 6 PM
Four Corners
[expand +]		 CTZ Moderate 51 Ozone 55 PPB 8-hour 7 PM
Other
[expand +]		 TEL Unhealthy 169 Particulate < 2.5 micrometers 89 µg/m3 24-hour 7 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 151 0.114 0.116 11 AM

* All data are reported in Mountain Standard Time (MST). During daylight savings time add one hour to the reported hour.